The minimum number of hours for a JAA PPL(H) is 45. If you did that on an R44 at £400 an hour, it would cost £18,000 at least. On an R22, at £250 an hour, you could get 72 hours for the same cost. Those extra 27 hours could give you more experience at being able to react. You will be trained to a standard. It may not take 45 hours (rarely does for ab-initio pilots); 60-70 hours is more common for students who have no aviation experience
Yes, the R22 is a tad twitchy, yes, it's harder to learn on and yes, you need quick reaction times but none of these is necessarily a bad thing!!!
Cheers
Whirls